geospatial

I’m working on an application integrating mapquest maps and using the mapquest API. At this moment I want to achieve the following: the registered user has to input latitude and longitude information, and in the database this information has to be stored as geometry type field. Conversely, a user looking at their account should see the latitude and longitude information that was entered. In an earlier simplified codebase I achieved this directly in the MySQL query, by using the MySQL functions AsText and GeomFromText . But now I’m on CodeIgniter and need to do the conversion in PHP Is there

I have a model type that was generated from a mysql table that has address data and also a spatial POINT field named "coordinates". When a model is created or updated I want to geocode the address and store the latitude and longitude coordinates in the POINT field. My understanding is the way to do this is to geocode the address in the model's beforeSave method. I have done this and have the coordinates in an associative array. Now my question is how can I insert this data into my coordinates field? This is what I'm trying: public function beforeSave() { $singleLineAddress = $this-

This demo program (intended to be run in an IPython notebook; you need matplotlib , mpl_toolkits.basemap , pyproj , and shapely ) is supposed to plot increasingly large circles on the surface of the Earth. It works correctly as long as the circle does not cross over one of the poles. If that happens, the result is complete nonsense when plotted on a map (see below cell 2) If I plot them "in a void" instead of on a map (see below cell 3) the results are correct in the sense that, if you removed the horizontal line going from +180 to -180 longitude, the rest of the curve would indeed delimit the

I have millions of GPS coordinates and want to quickly add a column of the country of the coordinates. My current method works but is extremely slow: library(data.table) #REPRODUCE DATA data <- data.table(latitude=sample(seq(47,52,by=0.001), 1000000, replace = TRUE), longitude=sample(seq(8,23,by=0.001), 1000000, replace = TRUE)) #REQUIRED PACKAGES if (!require("sp")) install.packages("sp") if (!require("rworldmap")) install.packages("rworldmap") if (!require("sf")) install.packages("sf") library(sp) library(rworldmap) library(sf) #CURRENT SLOW FUNCTION coords2country = function(points,latcol

I want to set "EPSG:4326" as the projection of an OpenLayers map, but when I try it, I always get "EPSG:900913". function init() { var options = { projection: new OpenLayers.Projection("EPSG:4326") // ignored }; map = new OpenLayers.Map('map', options); var layer = new OpenLayers.Layer.OSM.Osmarender("Osmarender"); map.addLayer(layer); ... alert(map.getProjection()); // returns "EPSG:900913" ... } The base map is open street map. How can I set the Projection to EPSG:4326? It is Osmarender that has a hardcoded 900913 projection, nothing to do about that. But have you considered taking things

I'm new to XML and we need to do GeoCoding with the new Bing Spatial Data API . I've managed to get a result back from them in xml format. How would I read specific elements in the response, ie. the Link, Status and ErrorMessages? <?xml version="1.0" encoding="utf-8"?> <Response xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.microsoft.com/search/local/ws/rest/v1"> <Copyright>Copyright © 2011 Microsoft and its suppliers. All rights reserved. This API cannot be accessed and the content and any results may not be used,